Journal ArticleDOI
Thermal and non-thermal interaction of microwave radiation with materials
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TLDR
In this paper, the authors discuss the conflicting results reported in the literature on the effect of microwave radiation on the dielectric heating of materials, and show that microwave radiation has a clear reaction rate enhancement compared to the thermal method under similar reaction conditions and temperatures indicating a "microwave specific effect".Abstract:
Industrial use of microwave radiation as an alternative to conventional thermal heating has generated interest recently mainly because of the drastic reduction in the processing time. In spite of its wide application, its chemical mechanism of interaction with materials has not been well understood. The current debate on the alternative use of microwave radiation to conventional thermal heating is on the involvement of a “microwave specific effect” other than the well accepted dielectric heating. There are reports of various reactions which show similar kinetics under both microwave and thermal methods at similar temperatures suggesting simple dielectric heating of materials by microwaves. There are also reports which show a clear reaction rate enhancement under microwave radiation compared to the thermal method under similar reaction conditions and temperatures indicating a “microwave specific effect” other than the simple dielectric heating of materials. This paper will discuss the above conflicting results reported in the literature.read more
Citations
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Microwaves in organic synthesis. thermal and non-thermal microwave effects
TL;DR: An overview of the thermal effects and the current state of non-thermal microwave effects is presented in this critical review along with a view on how these phenomena can be effectively used in organic synthesis.
Journal ArticleDOI
A tentative rationalization of microwave effects in organic synthesis according to the reaction medium, and mechanistic considerations
Laurence Perreux,André Loupy +1 more
Journal ArticleDOI
Microwave heating applications in environmental engineering—a review
TL;DR: In this article, a review of microwave heating applications in environmental engineering is presented, which identifies the areas of potential commercial development as contaminated soil vitrification, volatile organic compounds (VOC) treatment and recovery, waste sludge processing, mineral ore grinding and carbon in pulp gold recovery.
Journal ArticleDOI
Microwave-assisted preparation of inorganic nanostructures in liquid phase.
Ying-Jie Zhu,Feng Chen +1 more
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Electromagnetic and absorption properties of some microwave absorbers
Ahmad Nazlim Yusoff,Mustaffa Hj Abdullah,Sahrim Ahmad,S. F. Jusoh,Abdul Aziz Mansor,Siti Atkah Abdul Hamid +5 more
TL;DR: In this paper, the absorption properties of a thermoplastic natural rubber (TPNR), a lithium-nickel-zinc (Li-Ni-Zn) ferrite and a TPNR-ferrite composite were investigated.
References
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Journal ArticleDOI
The use of microwave ovens for rapid organic synthesis
R. N. Gedye,Frank E. Smith,Kenneth Charles Westaway,Humera Ali,Lorraine Baldisera,Lena Laberge,John Rousell +6 more
TL;DR: In this paper, four different types of organic reactions have been studied and seven different organic compounds have been prepared, under pressure in a microwave oven, and considerable rate increases have been observed.
Journal ArticleDOI
Tilden Lecture. Applications of microwave dielectric heating effects to synthetic problems in chemistry
TL;DR: In this paper, the principles underlying the dielectric heating effects observed for chemical compounds in solution and in the solid state are presented, and applications of the technique to a wide range of chemical syntheses have also been indicated.
Journal ArticleDOI
Application of commercial microwave ovens to organic synthesis.
TL;DR: In this article, commercial microwave ovens have been safely used to dramatically reduce the reaction times (at comparable yield) of Diels-Alder, Claisen, and ene reactions.
Journal ArticleDOI
The rapid synthesis of organic compounds in microwave ovens
TL;DR: In this article, it was shown that organic compounds can be synthesized up to 1240 times faster in sealed Teflon vessels in a microwave oven than by conventional (reflux) techniques.
Journal ArticleDOI
Bulk polymerization of methyl methacrylate
S. T. Balke,Archie E. Hamielec +1 more
TL;DR: In this article, an experimental investigation of the chemical-initiated (AIBN) bulk polymerization of methyl methacrylate to limiting conversion at temperatures of 50°C, 70°, and 90°C was performed.
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